I'm running Sublime Text 3 on OSX (Yosemite). Without any explicit changes from my side, the sidebar color scheme has stopped working, Logs on console don't show any errors, and I've even tried reverting the installation to the default without any success, can you think of anything that could be causing this issue or do you have any ideas for further troubleshooting?I'm also running Sublime Text 2 and sidebar works fine there (indicating it's not an issue on my environment?)

I am having the exact same issue. It started happening at around the beginning of February, but I have forgotten what I installed. I must have clicked OK to an update prompt for Sublime Text 3 or something.